Commit | Line | Data |
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f377b406 | 1 | /* TUI support I/O functions. |
f33c6cbf | 2 | |
e2882c85 | 3 | Copyright (C) 1998-2018 Free Software Foundation, Inc. |
f33c6cbf | 4 | |
f377b406 SC |
5 | Contributed by Hewlett-Packard Company. |
6 | ||
7 | This file is part of GDB. | |
8 | ||
9 | This program is free software; you can redistribute it and/or modify | |
10 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 11 | the Free Software Foundation; either version 3 of the License, or |
f377b406 SC |
12 | (at your option) any later version. |
13 | ||
14 | This program is distributed in the hope that it will be useful, | |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU General Public License | |
a9762ec7 | 20 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
c906108c | 21 | |
c906108c | 22 | #include "defs.h" |
a198b876 SC |
23 | #include "target.h" |
24 | #include "event-loop.h" | |
e09d2eba | 25 | #include "event-top.h" |
a198b876 SC |
26 | #include "command.h" |
27 | #include "top.h" | |
d7b2e967 AC |
28 | #include "tui/tui.h" |
29 | #include "tui/tui-data.h" | |
30 | #include "tui/tui-io.h" | |
31 | #include "tui/tui-command.h" | |
32 | #include "tui/tui-win.h" | |
33 | #include "tui/tui-wingeneral.h" | |
34 | #include "tui/tui-file.h" | |
112e8700 | 35 | #include "tui/tui-out.h" |
a198b876 SC |
36 | #include "ui-out.h" |
37 | #include "cli-out.h" | |
38 | #include <fcntl.h> | |
9d876a16 | 39 | #include <signal.h> |
614c279d | 40 | #include "filestuff.h" |
82083d6d | 41 | #include "completer.h" |
6a83354a | 42 | #include "gdb_curses.h" |
a198b876 | 43 | |
4a1bcc8c MK |
44 | /* This redefines CTRL if it is not already defined, so it must come |
45 | after terminal state releated include files like <term.h> and | |
46 | "gdb_curses.h". */ | |
47 | #include "readline/readline.h" | |
48 | ||
84371624 TT |
49 | static int tui_getc (FILE *fp); |
50 | ||
51 | static int | |
bcdf1568 AC |
52 | key_is_start_sequence (int ch) |
53 | { | |
54 | return (ch == 27); | |
55 | } | |
56 | ||
ec6f8892 SC |
57 | /* Use definition from readline 4.3. */ |
58 | #undef CTRL_CHAR | |
08ef48c5 MS |
59 | #define CTRL_CHAR(c) \ |
60 | ((c) < control_character_threshold && (((c) & 0x80) == 0)) | |
ec6f8892 | 61 | |
a198b876 SC |
62 | /* This file controls the IO interactions between gdb and curses. |
63 | When the TUI is enabled, gdb has two modes a curses and a standard | |
64 | mode. | |
65 | ||
1cc6d956 MS |
66 | In curses mode, the gdb outputs are made in a curses command |
67 | window. For this, the gdb_stdout and gdb_stderr are redirected to | |
68 | the specific ui_file implemented by TUI. The output is handled by | |
69 | tui_puts(). The input is also controlled by curses with | |
70 | tui_getc(). The readline library uses this function to get its | |
71 | input. Several readline hooks are installed to redirect readline | |
72 | output to the TUI (see also the note below). | |
a198b876 SC |
73 | |
74 | In normal mode, the gdb outputs are restored to their origin, that | |
75 | is as if TUI is not used. Readline also uses its original getc() | |
76 | function with stdin. | |
77 | ||
1cc6d956 MS |
78 | Note SCz/2001-07-21: the current readline is not clean in its |
79 | management of the output. Even if we install a redisplay handler, | |
80 | it sometimes writes on a stdout file. It is important to redirect | |
81 | every output produced by readline, otherwise the curses window will | |
82 | be garbled. This is implemented with a pipe that TUI reads and | |
83 | readline writes to. A gdb input handler is created so that reading | |
84 | the pipe is handled automatically. This will probably not work on | |
85 | non-Unix platforms. The best fix is to make readline clean enougth | |
86 | so that is never write on stdout. | |
87 | ||
88 | Note SCz/2002-09-01: we now use more readline hooks and it seems | |
89 | that with them we don't need the pipe anymore (verified by creating | |
90 | the pipe and closing its end so that write causes a SIGPIPE). The | |
91 | old pipe code is still there and can be conditionally removed by | |
8cee930b SC |
92 | #undef TUI_USE_PIPE_FOR_READLINE. */ |
93 | ||
94 | /* For gdb 5.3, prefer to continue the pipe hack as a backup wheel. */ | |
a156a290 | 95 | #ifdef HAVE_PIPE |
8cee930b | 96 | #define TUI_USE_PIPE_FOR_READLINE |
a156a290 | 97 | #endif |
1cc6d956 | 98 | /* #undef TUI_USE_PIPE_FOR_READLINE */ |
a198b876 SC |
99 | |
100 | /* TUI output files. */ | |
101 | static struct ui_file *tui_stdout; | |
102 | static struct ui_file *tui_stderr; | |
2b68e2c5 | 103 | struct ui_out *tui_out; |
a198b876 SC |
104 | |
105 | /* GDB output files in non-curses mode. */ | |
106 | static struct ui_file *tui_old_stdout; | |
107 | static struct ui_file *tui_old_stderr; | |
112e8700 | 108 | cli_ui_out *tui_old_uiout; |
a198b876 SC |
109 | |
110 | /* Readline previous hooks. */ | |
840ed64d JK |
111 | static rl_getc_func_t *tui_old_rl_getc_function; |
112 | static rl_voidfunc_t *tui_old_rl_redisplay_function; | |
113 | static rl_vintfunc_t *tui_old_rl_prep_terminal; | |
114 | static rl_voidfunc_t *tui_old_rl_deprep_terminal; | |
ef0b411a | 115 | static rl_compdisp_func_t *tui_old_rl_display_matches_hook; |
cc88a640 | 116 | static int tui_old_rl_echoing_p; |
a198b876 SC |
117 | |
118 | /* Readline output stream. | |
119 | Should be removed when readline is clean. */ | |
120 | static FILE *tui_rl_outstream; | |
121 | static FILE *tui_old_rl_outstream; | |
8cee930b | 122 | #ifdef TUI_USE_PIPE_FOR_READLINE |
a198b876 | 123 | static int tui_readline_pipe[2]; |
8cee930b | 124 | #endif |
c906108c | 125 | |
57266a33 SC |
126 | /* The last gdb prompt that was registered in readline. |
127 | This may be the main gdb prompt or a secondary prompt. */ | |
128 | static char *tui_rl_saved_prompt; | |
129 | ||
9753a2f6 PA |
130 | /* Print a character in the curses command window. The output is |
131 | buffered. It is up to the caller to refresh the screen if | |
132 | necessary. */ | |
133 | ||
134 | static void | |
135 | do_tui_putc (WINDOW *w, char c) | |
136 | { | |
137 | static int tui_skip_line = -1; | |
138 | ||
139 | /* Catch annotation and discard them. We need two \032 and discard | |
140 | until a \n is seen. */ | |
141 | if (c == '\032') | |
142 | { | |
143 | tui_skip_line++; | |
144 | } | |
145 | else if (tui_skip_line != 1) | |
146 | { | |
147 | tui_skip_line = -1; | |
148 | /* Expand TABs, since ncurses on MS-Windows doesn't. */ | |
149 | if (c == '\t') | |
150 | { | |
151 | int col; | |
152 | ||
153 | col = getcurx (w); | |
154 | do | |
155 | { | |
156 | waddch (w, ' '); | |
157 | col++; | |
158 | } | |
159 | while ((col % 8) != 0); | |
160 | } | |
161 | else | |
162 | waddch (w, c); | |
163 | } | |
164 | else if (c == '\n') | |
165 | tui_skip_line = -1; | |
166 | } | |
167 | ||
168 | /* Update the cached value of the command window's start line based on | |
169 | the window's current Y coordinate. */ | |
170 | ||
171 | static void | |
172 | update_cmdwin_start_line () | |
173 | { | |
174 | TUI_CMD_WIN->detail.command_info.start_line | |
175 | = getcury (TUI_CMD_WIN->generic.handle); | |
176 | } | |
177 | ||
178 | /* Print a character in the curses command window. The output is | |
179 | buffered. It is up to the caller to refresh the screen if | |
180 | necessary. */ | |
181 | ||
8cee930b SC |
182 | static void |
183 | tui_putc (char c) | |
184 | { | |
9753a2f6 | 185 | WINDOW *w = TUI_CMD_WIN->generic.handle; |
8cee930b | 186 | |
9753a2f6 PA |
187 | do_tui_putc (w, c); |
188 | update_cmdwin_start_line (); | |
8cee930b | 189 | } |
c906108c | 190 | |
9753a2f6 PA |
191 | /* Print LENGTH characters from the buffer pointed to by BUF to the |
192 | curses command window. The output is buffered. It is up to the | |
193 | caller to refresh the screen if necessary. */ | |
194 | ||
195 | void | |
196 | tui_write (const char *buf, size_t length) | |
197 | { | |
198 | WINDOW *w = TUI_CMD_WIN->generic.handle; | |
199 | ||
200 | for (size_t i = 0; i < length; i++) | |
201 | do_tui_putc (w, buf[i]); | |
202 | update_cmdwin_start_line (); | |
203 | } | |
204 | ||
205 | /* Print a string in the curses command window. The output is | |
206 | buffered. It is up to the caller to refresh the screen if | |
207 | necessary. */ | |
518be979 | 208 | |
c906108c | 209 | void |
a198b876 | 210 | tui_puts (const char *string) |
c906108c | 211 | { |
9753a2f6 | 212 | WINDOW *w = TUI_CMD_WIN->generic.handle; |
a198b876 | 213 | char c; |
c906108c | 214 | |
a198b876 | 215 | while ((c = *string++) != 0) |
9753a2f6 PA |
216 | do_tui_putc (w, c); |
217 | update_cmdwin_start_line (); | |
a198b876 SC |
218 | } |
219 | ||
220 | /* Readline callback. | |
221 | Redisplay the command line with its prompt after readline has | |
222 | changed the edited text. */ | |
e09d2eba | 223 | void |
a198b876 SC |
224 | tui_redisplay_readline (void) |
225 | { | |
226 | int prev_col; | |
227 | int height; | |
cecc8b99 | 228 | int col; |
a198b876 SC |
229 | int c_pos; |
230 | int c_line; | |
231 | int in; | |
232 | WINDOW *w; | |
e6a959d6 | 233 | const char *prompt; |
a198b876 | 234 | int start_line; |
e3da6fc5 SC |
235 | |
236 | /* Detect when we temporarily left SingleKey and now the readline | |
1cc6d956 | 237 | edit buffer is empty, automatically restore the SingleKey |
9b8d6827 SC |
238 | mode. The restore must only be done if the command has finished. |
239 | The command could call prompt_for_continue and we must not | |
240 | restore SingleKey so that the prompt and normal keymap are used. */ | |
241 | if (tui_current_key_mode == TUI_ONE_COMMAND_MODE && rl_end == 0 | |
dbf30ca3 | 242 | && !gdb_in_secondary_prompt_p (current_ui)) |
6d012f14 | 243 | tui_set_key_mode (TUI_SINGLE_KEY_MODE); |
e3da6fc5 | 244 | |
6d012f14 | 245 | if (tui_current_key_mode == TUI_SINGLE_KEY_MODE) |
e09d2eba SC |
246 | prompt = ""; |
247 | else | |
57266a33 | 248 | prompt = tui_rl_saved_prompt; |
a198b876 SC |
249 | |
250 | c_pos = -1; | |
251 | c_line = -1; | |
6d012f14 AC |
252 | w = TUI_CMD_WIN->generic.handle; |
253 | start_line = TUI_CMD_WIN->detail.command_info.start_line; | |
a198b876 SC |
254 | wmove (w, start_line, 0); |
255 | prev_col = 0; | |
256 | height = 1; | |
257 | for (in = 0; prompt && prompt[in]; in++) | |
258 | { | |
259 | waddch (w, prompt[in]); | |
cecc8b99 | 260 | col = getcurx (w); |
588dcc3e | 261 | if (col <= prev_col) |
a198b876 SC |
262 | height++; |
263 | prev_col = col; | |
264 | } | |
588dcc3e | 265 | for (in = 0; in <= rl_end; in++) |
a198b876 SC |
266 | { |
267 | unsigned char c; | |
268 | ||
a198b876 SC |
269 | if (in == rl_point) |
270 | { | |
271 | getyx (w, c_line, c_pos); | |
272 | } | |
273 | ||
588dcc3e PP |
274 | if (in == rl_end) |
275 | break; | |
276 | ||
277 | c = (unsigned char) rl_line_buffer[in]; | |
a198b876 SC |
278 | if (CTRL_CHAR (c) || c == RUBOUT) |
279 | { | |
280 | waddch (w, '^'); | |
281 | waddch (w, CTRL_CHAR (c) ? UNCTRL (c) : '?'); | |
282 | } | |
312809f8 EZ |
283 | else if (c == '\t') |
284 | { | |
285 | /* Expand TABs, since ncurses on MS-Windows doesn't. */ | |
cecc8b99 | 286 | col = getcurx (w); |
312809f8 EZ |
287 | do |
288 | { | |
289 | waddch (w, ' '); | |
290 | col++; | |
291 | } while ((col % 8) != 0); | |
292 | } | |
c906108c SS |
293 | else |
294 | { | |
a198b876 | 295 | waddch (w, c); |
c906108c | 296 | } |
a198b876 | 297 | if (c == '\n') |
6f1cb6ea | 298 | TUI_CMD_WIN->detail.command_info.start_line = getcury (w); |
cecc8b99 | 299 | col = getcurx (w); |
a198b876 SC |
300 | if (col < prev_col) |
301 | height++; | |
302 | prev_col = col; | |
c906108c | 303 | } |
a198b876 | 304 | wclrtobot (w); |
6f1cb6ea | 305 | TUI_CMD_WIN->detail.command_info.start_line = getcury (w); |
a198b876 | 306 | if (c_line >= 0) |
6f1cb6ea | 307 | wmove (w, c_line, c_pos); |
6d012f14 | 308 | TUI_CMD_WIN->detail.command_info.start_line -= height - 1; |
a198b876 | 309 | |
a198b876 SC |
310 | wrefresh (w); |
311 | fflush(stdout); | |
312 | } | |
313 | ||
1cc6d956 MS |
314 | /* Readline callback to prepare the terminal. It is called once each |
315 | time we enter readline. Terminal is already setup in curses | |
316 | mode. */ | |
a198b876 | 317 | static void |
88fa91b4 | 318 | tui_prep_terminal (int notused1) |
c906108c | 319 | { |
57266a33 SC |
320 | /* Save the prompt registered in readline to correctly display it. |
321 | (we can't use gdb_prompt() due to secondary prompts and can't use | |
322 | rl_prompt because it points to an alloca buffer). */ | |
323 | xfree (tui_rl_saved_prompt); | |
36d6eb95 | 324 | tui_rl_saved_prompt = rl_prompt != NULL ? xstrdup (rl_prompt) : NULL; |
a198b876 | 325 | } |
c906108c | 326 | |
1cc6d956 MS |
327 | /* Readline callback to restore the terminal. It is called once each |
328 | time we leave readline. There is nothing to do in curses mode. */ | |
a198b876 SC |
329 | static void |
330 | tui_deprep_terminal (void) | |
331 | { | |
332 | } | |
c906108c | 333 | |
8cee930b | 334 | #ifdef TUI_USE_PIPE_FOR_READLINE |
a198b876 SC |
335 | /* Read readline output pipe and feed the command window with it. |
336 | Should be removed when readline is clean. */ | |
337 | static void | |
01f69b38 | 338 | tui_readline_output (int error, gdb_client_data data) |
a198b876 SC |
339 | { |
340 | int size; | |
341 | char buf[256]; | |
c906108c | 342 | |
a198b876 SC |
343 | size = read (tui_readline_pipe[0], buf, sizeof (buf) - 1); |
344 | if (size > 0 && tui_active) | |
c906108c | 345 | { |
a198b876 SC |
346 | buf[size] = 0; |
347 | tui_puts (buf); | |
c906108c | 348 | } |
a198b876 | 349 | } |
8cee930b SC |
350 | #endif |
351 | ||
82083d6d | 352 | /* TUI version of displayer.crlf. */ |
8cee930b | 353 | |
82083d6d DE |
354 | static void |
355 | tui_mld_crlf (const struct match_list_displayer *displayer) | |
8cee930b | 356 | { |
82083d6d | 357 | tui_putc ('\n'); |
8cee930b SC |
358 | } |
359 | ||
82083d6d | 360 | /* TUI version of displayer.putch. */ |
8cee930b | 361 | |
82083d6d DE |
362 | static void |
363 | tui_mld_putch (const struct match_list_displayer *displayer, int ch) | |
8cee930b | 364 | { |
82083d6d | 365 | tui_putc (ch); |
8cee930b SC |
366 | } |
367 | ||
82083d6d DE |
368 | /* TUI version of displayer.puts. */ |
369 | ||
370 | static void | |
371 | tui_mld_puts (const struct match_list_displayer *displayer, const char *s) | |
8cee930b | 372 | { |
82083d6d DE |
373 | tui_puts (s); |
374 | } | |
8cee930b | 375 | |
82083d6d DE |
376 | /* TUI version of displayer.flush. */ |
377 | ||
378 | static void | |
379 | tui_mld_flush (const struct match_list_displayer *displayer) | |
380 | { | |
381 | wrefresh (TUI_CMD_WIN->generic.handle); | |
8cee930b SC |
382 | } |
383 | ||
82083d6d | 384 | /* TUI version of displayer.erase_entire_line. */ |
8cee930b | 385 | |
8cee930b | 386 | static void |
82083d6d | 387 | tui_mld_erase_entire_line (const struct match_list_displayer *displayer) |
8cee930b | 388 | { |
82083d6d | 389 | WINDOW *w = TUI_CMD_WIN->generic.handle; |
6f1cb6ea | 390 | int cur_y = getcury (w); |
8cee930b | 391 | |
6f1cb6ea | 392 | wmove (w, cur_y, 0); |
82083d6d | 393 | wclrtoeol (w); |
6f1cb6ea | 394 | wmove (w, cur_y, 0); |
82083d6d | 395 | } |
8cee930b | 396 | |
82083d6d | 397 | /* TUI version of displayer.beep. */ |
8cee930b | 398 | |
82083d6d DE |
399 | static void |
400 | tui_mld_beep (const struct match_list_displayer *displayer) | |
401 | { | |
402 | beep (); | |
403 | } | |
404 | ||
7a956928 TT |
405 | /* A wrapper for wgetch that enters nonl mode. We We normally want |
406 | curses' "nl" mode, but when reading from the user, we'd like to | |
407 | differentiate between C-j and C-m, because some users bind these | |
408 | keys differently in their .inputrc. So, put curses into nonl mode | |
409 | just when reading from the user. See PR tui/20819. */ | |
410 | ||
411 | static int | |
412 | gdb_wgetch (WINDOW *win) | |
413 | { | |
414 | nonl (); | |
415 | int r = wgetch (win); | |
416 | nl (); | |
417 | return r; | |
418 | } | |
419 | ||
82083d6d DE |
420 | /* Helper function for tui_mld_read_key. |
421 | This temporarily replaces tui_getc for use during tab-completion | |
422 | match list display. */ | |
423 | ||
424 | static int | |
425 | tui_mld_getc (FILE *fp) | |
426 | { | |
427 | WINDOW *w = TUI_CMD_WIN->generic.handle; | |
7a956928 | 428 | int c = gdb_wgetch (w); |
8cee930b | 429 | |
82083d6d DE |
430 | return c; |
431 | } | |
8cee930b | 432 | |
82083d6d | 433 | /* TUI version of displayer.read_key. */ |
8cee930b | 434 | |
82083d6d DE |
435 | static int |
436 | tui_mld_read_key (const struct match_list_displayer *displayer) | |
437 | { | |
438 | rl_getc_func_t *prev = rl_getc_function; | |
439 | int c; | |
8cee930b | 440 | |
82083d6d DE |
441 | /* We can't use tui_getc as we need NEWLINE to not get emitted. */ |
442 | rl_getc_function = tui_mld_getc; | |
443 | c = rl_read_key (); | |
444 | rl_getc_function = prev; | |
445 | return c; | |
446 | } | |
8cee930b | 447 | |
82083d6d DE |
448 | /* TUI version of rl_completion_display_matches_hook. |
449 | See gdb_display_match_list for a description of the arguments. */ | |
8cee930b | 450 | |
82083d6d DE |
451 | static void |
452 | tui_rl_display_match_list (char **matches, int len, int max) | |
453 | { | |
454 | struct match_list_displayer displayer; | |
455 | ||
456 | rl_get_screen_size (&displayer.height, &displayer.width); | |
457 | displayer.crlf = tui_mld_crlf; | |
458 | displayer.putch = tui_mld_putch; | |
459 | displayer.puts = tui_mld_puts; | |
460 | displayer.flush = tui_mld_flush; | |
461 | displayer.erase_entire_line = tui_mld_erase_entire_line; | |
462 | displayer.beep = tui_mld_beep; | |
463 | displayer.read_key = tui_mld_read_key; | |
464 | ||
465 | gdb_display_match_list (matches, len, max, &displayer); | |
8cee930b | 466 | } |
a198b876 SC |
467 | |
468 | /* Setup the IO for curses or non-curses mode. | |
469 | - In non-curses mode, readline and gdb use the standard input and | |
470 | standard output/error directly. | |
471 | - In curses mode, the standard output/error is controlled by TUI | |
472 | with the tui_stdout and tui_stderr. The output is redirected in | |
473 | the curses command window. Several readline callbacks are installed | |
474 | so that readline asks for its input to the curses command window | |
475 | with wgetch(). */ | |
476 | void | |
477 | tui_setup_io (int mode) | |
478 | { | |
cc88a640 JK |
479 | extern int _rl_echoing_p; |
480 | ||
a198b876 | 481 | if (mode) |
c906108c | 482 | { |
a198b876 SC |
483 | /* Redirect readline to TUI. */ |
484 | tui_old_rl_redisplay_function = rl_redisplay_function; | |
485 | tui_old_rl_deprep_terminal = rl_deprep_term_function; | |
486 | tui_old_rl_prep_terminal = rl_prep_term_function; | |
487 | tui_old_rl_getc_function = rl_getc_function; | |
ef0b411a | 488 | tui_old_rl_display_matches_hook = rl_completion_display_matches_hook; |
a198b876 | 489 | tui_old_rl_outstream = rl_outstream; |
cc88a640 | 490 | tui_old_rl_echoing_p = _rl_echoing_p; |
a198b876 SC |
491 | rl_redisplay_function = tui_redisplay_readline; |
492 | rl_deprep_term_function = tui_deprep_terminal; | |
493 | rl_prep_term_function = tui_prep_terminal; | |
494 | rl_getc_function = tui_getc; | |
cc88a640 | 495 | _rl_echoing_p = 0; |
a198b876 SC |
496 | rl_outstream = tui_rl_outstream; |
497 | rl_prompt = 0; | |
8cee930b SC |
498 | rl_completion_display_matches_hook = tui_rl_display_match_list; |
499 | rl_already_prompted = 0; | |
a198b876 SC |
500 | |
501 | /* Keep track of previous gdb output. */ | |
502 | tui_old_stdout = gdb_stdout; | |
503 | tui_old_stderr = gdb_stderr; | |
112e8700 SM |
504 | tui_old_uiout = dynamic_cast<cli_ui_out *> (current_uiout); |
505 | gdb_assert (tui_old_uiout != nullptr); | |
a198b876 SC |
506 | |
507 | /* Reconfigure gdb output. */ | |
508 | gdb_stdout = tui_stdout; | |
509 | gdb_stderr = tui_stderr; | |
510 | gdb_stdlog = gdb_stdout; /* for moment */ | |
511 | gdb_stdtarg = gdb_stderr; /* for moment */ | |
8d4d924b | 512 | gdb_stdtargerr = gdb_stderr; /* for moment */ |
79a45e25 | 513 | current_uiout = tui_out; |
9d876a16 SC |
514 | |
515 | /* Save tty for SIGCONT. */ | |
516 | savetty (); | |
c906108c | 517 | } |
a198b876 | 518 | else |
c906108c | 519 | { |
a198b876 SC |
520 | /* Restore gdb output. */ |
521 | gdb_stdout = tui_old_stdout; | |
522 | gdb_stderr = tui_old_stderr; | |
523 | gdb_stdlog = gdb_stdout; /* for moment */ | |
524 | gdb_stdtarg = gdb_stderr; /* for moment */ | |
8d4d924b | 525 | gdb_stdtargerr = gdb_stderr; /* for moment */ |
79a45e25 | 526 | current_uiout = tui_old_uiout; |
a198b876 SC |
527 | |
528 | /* Restore readline. */ | |
529 | rl_redisplay_function = tui_old_rl_redisplay_function; | |
530 | rl_deprep_term_function = tui_old_rl_deprep_terminal; | |
531 | rl_prep_term_function = tui_old_rl_prep_terminal; | |
532 | rl_getc_function = tui_old_rl_getc_function; | |
ef0b411a | 533 | rl_completion_display_matches_hook = tui_old_rl_display_matches_hook; |
a198b876 | 534 | rl_outstream = tui_old_rl_outstream; |
cc88a640 | 535 | _rl_echoing_p = tui_old_rl_echoing_p; |
bd9b0abf | 536 | rl_already_prompted = 0; |
9d876a16 SC |
537 | |
538 | /* Save tty for SIGCONT. */ | |
539 | savetty (); | |
540 | } | |
541 | } | |
542 | ||
543 | #ifdef SIGCONT | |
544 | /* Catch SIGCONT to restore the terminal and refresh the screen. */ | |
545 | static void | |
546 | tui_cont_sig (int sig) | |
547 | { | |
548 | if (tui_active) | |
549 | { | |
550 | /* Restore the terminal setting because another process (shell) | |
551 | might have changed it. */ | |
552 | resetty (); | |
553 | ||
554 | /* Force a refresh of the screen. */ | |
a21fcd8f | 555 | tui_refresh_all_win (); |
d75e970c | 556 | |
6d012f14 | 557 | wrefresh (TUI_CMD_WIN->generic.handle); |
c906108c | 558 | } |
9d876a16 | 559 | signal (sig, tui_cont_sig); |
a198b876 | 560 | } |
9d876a16 | 561 | #endif |
c906108c | 562 | |
a198b876 SC |
563 | /* Initialize the IO for gdb in curses mode. */ |
564 | void | |
d02c80cd | 565 | tui_initialize_io (void) |
a198b876 | 566 | { |
9d876a16 SC |
567 | #ifdef SIGCONT |
568 | signal (SIGCONT, tui_cont_sig); | |
569 | #endif | |
570 | ||
a198b876 | 571 | /* Create tui output streams. */ |
d7e74731 PA |
572 | tui_stdout = new tui_file (stdout); |
573 | tui_stderr = new tui_file (stderr); | |
a198b876 SC |
574 | tui_out = tui_out_new (tui_stdout); |
575 | ||
43df09d9 | 576 | /* Create the default UI. */ |
4801a9a3 | 577 | tui_old_uiout = cli_out_new (gdb_stdout); |
a198b876 | 578 | |
8cee930b | 579 | #ifdef TUI_USE_PIPE_FOR_READLINE |
1cc6d956 MS |
580 | /* Temporary solution for readline writing to stdout: redirect |
581 | readline output in a pipe, read that pipe and output the content | |
582 | in the curses command window. */ | |
614c279d | 583 | if (gdb_pipe_cloexec (tui_readline_pipe) != 0) |
e0e6bcab GB |
584 | error (_("Cannot create pipe for readline")); |
585 | ||
a198b876 SC |
586 | tui_rl_outstream = fdopen (tui_readline_pipe[1], "w"); |
587 | if (tui_rl_outstream == 0) | |
e0e6bcab GB |
588 | error (_("Cannot redirect readline output")); |
589 | ||
0f59c96f | 590 | setvbuf (tui_rl_outstream, (char*) NULL, _IOLBF, 0); |
c906108c | 591 | |
a198b876 SC |
592 | #ifdef O_NONBLOCK |
593 | (void) fcntl (tui_readline_pipe[0], F_SETFL, O_NONBLOCK); | |
c906108c | 594 | #else |
a198b876 SC |
595 | #ifdef O_NDELAY |
596 | (void) fcntl (tui_readline_pipe[0], F_SETFL, O_NDELAY); | |
c906108c | 597 | #endif |
a198b876 | 598 | #endif |
a198b876 | 599 | add_file_handler (tui_readline_pipe[0], tui_readline_output, 0); |
8cee930b SC |
600 | #else |
601 | tui_rl_outstream = stdout; | |
602 | #endif | |
a198b876 SC |
603 | } |
604 | ||
1cc6d956 MS |
605 | /* Get a character from the command window. This is called from the |
606 | readline package. */ | |
84371624 | 607 | static int |
a198b876 SC |
608 | tui_getc (FILE *fp) |
609 | { | |
610 | int ch; | |
611 | WINDOW *w; | |
612 | ||
6d012f14 | 613 | w = TUI_CMD_WIN->generic.handle; |
a198b876 | 614 | |
8cee930b | 615 | #ifdef TUI_USE_PIPE_FOR_READLINE |
a198b876 | 616 | /* Flush readline output. */ |
01f69b38 | 617 | tui_readline_output (0, 0); |
8cee930b SC |
618 | #endif |
619 | ||
7a956928 | 620 | ch = gdb_wgetch (w); |
c906108c | 621 | |
1cc6d956 MS |
622 | /* The \n must be echoed because it will not be printed by |
623 | readline. */ | |
a198b876 SC |
624 | if (ch == '\n') |
625 | { | |
626 | /* When hitting return with an empty input, gdb executes the last | |
627 | command. If we emit a newline, this fills up the command window | |
628 | with empty lines with gdb prompt at beginning. Instead of that, | |
629 | stay on the same line but provide a visual effect to show the | |
630 | user we recognized the command. */ | |
dbf30ca3 | 631 | if (rl_end == 0 && !gdb_in_secondary_prompt_p (current_ui)) |
a198b876 | 632 | { |
6f1cb6ea | 633 | wmove (w, getcury (w), 0); |
a198b876 SC |
634 | |
635 | /* Clear the line. This will blink the gdb prompt since | |
636 | it will be redrawn at the same line. */ | |
637 | wclrtoeol (w); | |
638 | wrefresh (w); | |
639 | napms (20); | |
640 | } | |
641 | else | |
642 | { | |
d9080678 PP |
643 | /* Move cursor to the end of the command line before emitting the |
644 | newline. We need to do so because when ncurses outputs a newline | |
645 | it truncates any text that appears past the end of the cursor. */ | |
6f1cb6ea PP |
646 | int px, py; |
647 | getyx (w, py, px); | |
d9080678 PP |
648 | px += rl_end - rl_point; |
649 | py += px / TUI_CMD_WIN->generic.width; | |
650 | px %= TUI_CMD_WIN->generic.width; | |
651 | wmove (w, py, px); | |
7a8bcb88 | 652 | tui_putc ('\n'); |
a198b876 SC |
653 | } |
654 | } | |
655 | ||
69efdff1 PP |
656 | /* Handle prev/next/up/down here. */ |
657 | ch = tui_dispatch_ctrl_char (ch); | |
a198b876 | 658 | |
a198b876 SC |
659 | if (ch == KEY_BACKSPACE) |
660 | return '\b'; | |
d64e57fa | 661 | |
3c216924 | 662 | if (current_ui->command_editing && key_is_start_sequence (ch)) |
d64e57fa PP |
663 | { |
664 | int ch_pending; | |
665 | ||
666 | nodelay (w, TRUE); | |
7a956928 | 667 | ch_pending = gdb_wgetch (w); |
d64e57fa PP |
668 | nodelay (w, FALSE); |
669 | ||
670 | /* If we have pending input following a start sequence, call the stdin | |
671 | event handler again because ncurses may have already read and stored | |
672 | the input into its internal buffer, meaning that we won't get an stdin | |
673 | event for it. If we don't compensate for this missed stdin event, key | |
674 | sequences as Alt_F (^[f) will not behave promptly. | |
675 | ||
676 | (We only compensates for the missed 2nd byte of a key sequence because | |
677 | 2-byte sequences are by far the most commonly used. ncurses may have | |
678 | buffered a larger, 3+-byte key sequence though it remains to be seen | |
679 | whether it is useful to compensate for all the bytes of such | |
680 | sequences.) */ | |
681 | if (ch_pending != ERR) | |
682 | { | |
683 | ungetch (ch_pending); | |
684 | call_stdin_event_handler_again_p = 1; | |
685 | } | |
686 | } | |
687 | ||
c906108c | 688 | return ch; |
a198b876 | 689 | } |
c906108c | 690 | |
312809f8 EZ |
691 | /* Utility function to expand TABs in a STRING into spaces. STRING |
692 | will be displayed starting at column COL, and is assumed to include | |
693 | no newlines. The returned expanded string is malloc'ed. */ | |
694 | ||
695 | char * | |
696 | tui_expand_tabs (const char *string, int col) | |
697 | { | |
b1a0f704 | 698 | int n_adjust, ncol; |
312809f8 EZ |
699 | const char *s; |
700 | char *ret, *q; | |
701 | ||
702 | /* 1. How many additional characters do we need? */ | |
b1a0f704 | 703 | for (ncol = col, n_adjust = 0, s = string; s; ) |
312809f8 EZ |
704 | { |
705 | s = strpbrk (s, "\t"); | |
706 | if (s) | |
707 | { | |
b1a0f704 | 708 | ncol += (s - string) + n_adjust; |
312809f8 EZ |
709 | /* Adjustment for the next tab stop, minus one for the TAB |
710 | we replace with spaces. */ | |
b1a0f704 | 711 | n_adjust += 8 - (ncol % 8) - 1; |
312809f8 EZ |
712 | s++; |
713 | } | |
714 | } | |
715 | ||
716 | /* Allocate the copy. */ | |
224c3ddb | 717 | ret = q = (char *) xmalloc (strlen (string) + n_adjust + 1); |
312809f8 EZ |
718 | |
719 | /* 2. Copy the original string while replacing TABs with spaces. */ | |
b1a0f704 | 720 | for (ncol = col, s = string; s; ) |
312809f8 | 721 | { |
cd46431b | 722 | const char *s1 = strpbrk (s, "\t"); |
312809f8 EZ |
723 | if (s1) |
724 | { | |
725 | if (s1 > s) | |
726 | { | |
727 | strncpy (q, s, s1 - s); | |
728 | q += s1 - s; | |
b1a0f704 | 729 | ncol += s1 - s; |
312809f8 EZ |
730 | } |
731 | do { | |
732 | *q++ = ' '; | |
b1a0f704 EZ |
733 | ncol++; |
734 | } while ((ncol % 8) != 0); | |
312809f8 EZ |
735 | s1++; |
736 | } | |
737 | else | |
738 | strcpy (q, s); | |
739 | s = s1; | |
740 | } | |
741 | ||
742 | return ret; | |
743 | } |